CN103794425B - Earth leakage protective device - Google Patents
Earth leakage protective device Download PDFInfo
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- CN103794425B CN103794425B CN201410057495.1A CN201410057495A CN103794425B CN 103794425 B CN103794425 B CN 103794425B CN 201410057495 A CN201410057495 A CN 201410057495A CN 103794425 B CN103794425 B CN 103794425B
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Abstract
The present invention relates to earth leakage protective device, particularly to the earth leakage protective device of electromagnetic trip.The open a kind of earth leakage protective device of the present invention; including housing and the primary clustering being arranged in housing; primary clustering includes wiring board and electrical apparatus release frame for movement assembly; the circuit of wiring board is used for checking that electric leakage and overvoltage signal occur; and send signals to control electromagnetic trip assembly action; electrical apparatus release frame for movement assembly mainly includes a main basal base, two groups of movable contact springs and static contact, dropout plate, a push-pull bar, and main basal base is fixed on wiring board.The earth leakage protective device of the present invention is used for electic protection, and when detection occurs electric leakage, electrical apparatus release disconnects, to guarantee user security.
Description
Technical field
The present invention relates to earth leakage protective device, particularly to the earth leakage protective device of electromagnetic trip.
Background technology
Earth leakage protective device is used in electic protection, and when detection occurs electric leakage, electrical apparatus release disconnects, to guarantee user security.Earth leakage protective device is generally of the resetting-mechanism for being resetted by electrical apparatus release, is used for testing earth leakage protective mechanism for testing, and the hand tripping mechanism also with hand tripping having.Patent publication No. 201673875U discloses a kind of earth leakage protective device, detects leakage current by earth leakage protective wiring board, thus electrical apparatus release performs trip action.This earth leakage protective device has reset, test and the function of hand tripping, but its existence is disadvantageous in that: 1, causes the dropout life-span the longest in place of the structure design Shortcomings of electrical apparatus release.2, the circuit design of earth leakage protective wiring board is the most complicated, thus causes cost high.
Summary of the invention
Therefore, the present invention proposes that a kind of tripper structure is reliable and the simple and effective earth leakage protective device of earth leakage protective.
The present invention adopts the following technical scheme that realization:
A kind of earth leakage protective device; including housing and the primary clustering being arranged in housing; primary clustering includes wiring board and electrical apparatus release frame for movement assembly; the circuit of wiring board is used for checking that electric leakage and overvoltage signal occur; and send signals to control electromagnetic trip assembly action; electrical apparatus release frame for movement assembly mainly includes a main basal base, two groups of movable contact springs and static contact, dropout plate, a push-pull bar, and main basal base is fixed on wiring board；Electromagnetic trip assembly is arranged in main basal base, the front end of main basal base is additionally provided with stopper slot, the bottom of stopper slot is provided with a back-moving spring, the pars intermedia of dropout plate is provided with a notch being positioned at top, there are cross bar, dropout plate to be provided in the stopper slot of main basal base being positioned at the extension connection of left and right both wings, and the limited groove of pars intermedia of dropout plate is spacing, the cross bar of the both wings of dropout plate exposes, and the dropout head of electromagnetic trip assembly is released the notch of plate and is limited without deviating from backward simultaneously；The both wings of main basal base are connected to one section of pole, the bottom of main basal base and be positioned at a rod rear end and be respectively arranged with dropout spring, 2 static contacts are arranged on the bottom of front end and distance main basal base and have the position of certain altitude, and it is respectively provided with contact, 2 movable contact springs are that the centre position of strip piece has to recessed turn of bilge, the recessed turn of bilge of these 2 movable contact springs is resisted against the pole of the both wings of main basal base respectively as fulcrum, thus by being positioned at the elastic force of the dropout spring of a rod rear end, movable contact spring front end is pressed down on the cross bar that the both wings at dropout plate expose, end, movable contact spring front end is provided with contact；The pars intermedia of dropout plate notch both sides overleaf are provided with chuck；Push-pull bar includes: main rod body, the limited block being connected in main rod body and be positioned at the snap fit of lower position, and the snap fit of bottom downwardly extends one section of back-moving spring locating dowel, push-pull bar is spacing in being inserted in the rail groove of main basal base front end-plate by the limited block that connects in its main rod body, the main rod body of push-pull bar, snap fit and back-moving spring locating dowel are arranged in the stopper slot of main basal base, and the back-moving spring locating dowel of main rod body is inserted in one end of the back-moving spring of the bottom being arranged on stopper slot.
Further, the circuit of this wiring board is a kind of overvoltage, leakage protection circuit, including: the electrical apparatus release that concatenation is connected on live wire and zero line switchs and the zero sequence current mutual inductor of socket, zero sequence current mutual inductor output is connected to an earth leakage protective control circuit being made up of earth leakage protective chip and peripheral circuit thereof, live wire and zero line are also attached to a rectifying bridge type unit, the output of rectifying bridge type unit is connected to an electric resistance partial pressure unit, the input concatenation Zener diode of this electric resistance partial pressure unit is followed by controlling end in a silicon controlled, simultaneously, the outfan of the above-mentioned earth leakage protective control circuit being made up of earth leakage protective chip and peripheral circuit thereof is also connected to this silicon controlled and controls end, this controllable silicon is connected with trip coil and accesses between live wire and zero line.
Further, circuit is specifically: include one end is connected, the other end is connected with load live wire L, zero line N and ground wire E with power supply；Described ground wire E connects the earth；Live wire L and zero line N are in series with the switch module of electrical apparatus release TK1, and it is socketed with a zero sequence current mutual inductor ZCT1, the coil block by the electrical apparatus release TK1 concatenated and rectifying bridge type cells D B1 being made up of 4 diode D3-D6 is connected between live wire L and zero line N, two outfans of this rectifying bridge type cells D B1 connect series resistor R6 and R7 and form electric resistance partial pressure unit, series resistance R6 of this electric resistance partial pressure unit, the intermediate ends of R7 connects the diode D8 control pole to controllable silicon SCR 1 of one reverse Zener diode D7 of series connection and a forward, the intermediate ends of this Zener diode D7 and polarity diode D8 be connected an electric capacity C7 to this rectifying bridge type cells D B1 rectification ground end；The outfan of above-mentioned zero sequence current mutual inductor ZCT1 connects has a control circuit, including earth leakage protective chip and peripheral circuit thereof, described zero sequence current mutual inductor ZCT1
nullSecondary windings two ends connect a resistance R5，The VFB pin of earth leakage protective chip IC 1 it is connected to after one end of this resistance R5 connects the Vref pin of earth leakage protective chip IC 1 and the other end is connected an electric capacity C4，It is connected to its Ground pin after the Rset pin serial connection one resistance R4 of earth leakage protective chip IC 1，The C Delay pin serial connection one electric capacity C2 of earth leakage protective chip IC 1 is to its Ground pin，The Vref pin serial connection one electric capacity C3 of earth leakage protective chip IC 1 is to its Ground pin，The Line pin of earth leakage protective chip IC 1 is connected to the anode of above-mentioned controllable silicon SCR 1 through the resistance R3 of concatenation，The anode of controllable silicon SCR 1 is connected to coil block and the intermediate ends of rectifying bridge type cells D B1 of electrical apparatus release TK1，The negative electrode of controllable silicon SCR 1 is connected to zero line N，The control end of controllable silicon SCR 1 it is connected to after the diode D9 of SCR Trigger pin serial connection one forward of earth leakage protective chip IC 1，Controllable silicon SCR 1 control the Neutral pin that end is also respectively connected with after an an electric capacity C1 and resistance R8 to earth leakage protective chip IC 1，The Neutral pin of this earth leakage protective chip IC 1 is connected to zero line N.
Further, this resistance R5 two ends filter capacitor C5 the most in parallel；The Rset pin (the 1st pin) of this earth leakage protective chip IC 1 is also connected and is connected to its Ground pin after an electric capacity C6.
Further, a varistor MOV1 it is also connected with between this live wire L and zero line N.
Further, the diode D1 of a forward, current-limiting resistance R2 and light emitting diode D2 it are also connected with between this live wire L and zero line N.
Further, also including a depression bar, the cross bar of the wherein side of this dropout plate also extends one section after vertical, forms a feeler lever, and conflicting this feeler lever in the lower end of depression bar, the upper end of depression bar is fixedly connected with the second button.
Further, the front end of this main basal base and be positioned at the left and right both wings of bottom and be provided with the fixed mount of static contact, and fixed mount has certain altitude, these 2 static contacts are the shape that n font downwardly extends a section, so that the n font part of this static contact can install the static contact fixed mount to main basal base.
Further, this wiring board offering the through hole making the main rod body of push-pull bar stretch through, the epimere of main rod body through hole from wiring board stretches through, and the end of the epimere of main rod body is fixed with the first button.
Further, also include the 3rd button, under it, conductive link is installed, there are on this wiring board 2 contacts that can make circuit test, when pressing three buttons, the conductive link being installed under it can be driven downward, these 2 test contacts on touching wiring board, and there is leakage current signal.
The present invention uses as above technical scheme, has that tripper structure is reliable and the simple and effective advantage of earth leakage protective.
Accompanying drawing explanation
Fig. 1 is the overall diagram of the earth leakage protective device of an embodiment；
Fig. 2 is the exploded view (angle one) of this embodiment housing and primary clustering；
Fig. 3 is the exploded view (angle two) of this embodiment housing and primary clustering；
Fig. 4 is the schematic perspective view of the principal component parts of this embodiment；
Fig. 5 is the sectional view of the principal component parts of this enforcement；
Fig. 6 is the exploded view (schematic diagram 1) of the principal component parts of this embodiment；
Fig. 7 is the exploded view (schematic diagram 2) of the principal component parts of this embodiment；
Fig. 8 is the exploded view (schematic diagram 3) of the principal component parts of this embodiment；
Fig. 9 is the exploded view (schematic diagram 4) of the principal component parts of this embodiment；
Figure 10 is the exploded view (schematic diagram 5) of the principal component parts of this embodiment；
Figure 11 is the circuit theory diagrams of the wiring board of this embodiment.
Detailed description of the invention
In conjunction with the drawings and specific embodiments, the present invention is further described.
The earth leakage protective device of one embodiment of the invention, including housing and the primary clustering being arranged in housing.Refering to Fig. 1-3, the housing in embodiment illustrates be combined into the structure of whole housing by upper shell 1, lower house 2 as a example by, and upper shell 1 is for the ease of installing button, is constituted upper shell 1 with the outer frame body 11 of upper casing and the internal frame body 12 of upper casing.The internal frame body 12 of upper casing is provided with 3 buttons, is " ON " button 131, " T " button 132 and " OFF " button 133 respectively, carries out corresponding function execution respectively.If " ON " button 131 is to trigger resetting-mechanism to be resetted by electrical apparatus release, " T " button 132 is that trigger tester structure is earth leakage protective for testing, and " OFF " button 133 is to trigger hand tripping mechanism to carry out hand tripping.
Primary clustering in housing includes a wiring board 3 and electrical apparatus release frame for movement assembly 4; the earth leakage protective wiring board being made up of some resistance elements on wiring board 3; for checking that electric leakage and overvoltage signal occur, and send signals to control electromagnetic trip assembly TK1 action.Hereafter come again the detailed circuit principle of this wiring board 3 is illustrated refering to Figure 11.Electrical apparatus release frame for movement assembly 4 is illustrated by first emphasis below.
Refering to Fig. 4-Figure 10, electrical apparatus release frame for movement assembly 4 mainly includes 41, two groups of movable contact springs 42 of a main basal base and static contact 43, dropout plate 44, push-pull bar 45 and depression bar 46.Additionally, also include 6 lugs 6, it is input and each 3 groups of outfan respectively, the often the most corresponding live wire of group, zero line and ground wire.Wherein the live wire of 2 lugs 6 of outfan and the wire of zero line must be set in the zero sequence current mutual inductor ZTC1 on wiring board 3, and electricity is respectively connecting on movable contact spring 42 (simple in figure, be not drawn into wire), input, outfan two lugs 6 of ground wire the most direct-connected.It should be noted that lug 6 is connected on copper sheet.If the live wire of outfan and the lug 6 of zero line are to lock on static contact 43, the lug 6 of input is also to lock to connect on copper sheet 47 in input.
The upper end of this main basal base 41 is provided with 2 snap fits 414, for snapping in fixing (can also substitute) by other fixed forms with wiring board 3.Also there is on this main basal base 41 the fixing cavity volume 413 of accommodating electromagnetic trip assembly TK1.The front end of main basal base 41 is additionally provided with a U-shaped stopper slot 414 being made up of front end-plate 4162 and end plate 4161, and when electromagnetic trip assembly TK1 is fixed on fixing cavity volume 413, the dropout 61 of this electromagnetic trip assembly TK1 is just positioned at stopper slot 414.The bottom of stopper slot 414 is provided with a back-moving spring 7.
The pars intermedia 443 of dropout plate 44 is provided with a notch 441 being positioned at top, extends connection have cross bar 442 being positioned at left and right both wings, and wherein the cross bar 442 of side also extends one section after vertical, forms a feeler lever 4421.Dropout plate 44 is provided in the stopper slot 414 of main basal base 41, and the pars intermedia 443 limited groove 414 of dropout plate 44 is spacing, and the cross bar 442 of the both wings of dropout plate 44 exposes.61 notch 441 being released plate 44 of threading off of the electromagnetic trip assembly TK1 being simultaneously positioned at stopper slot 414 are limited without deviating from backward.
The both wings of this main basal base 41 are connected to one section of pole 411.The bottom of main basal base 41 and be positioned at pole 411 rear end and be provided with spring anchorage bracket 412.In the front end of main basal base 41, the left and right both wings being positioned at bottom are provided with the fixed mount 415 of static contact, and fixed mount 415 has certain altitude.2 static contacts 43 downwardly extend the shape of a section for n font, so that the n font part of this static contact 43 can install the static contact fixed mount 415 to main basal base 41, thus the contact 431 of static contact 43 has certain altitude apart from the bottom of main basal base 41.2 movable contact springs 42 are that the centre position of strip piece has to recessed turn of bilge 421.The recessed turn of bilge 421 of these 2 movable contact springs 42 bears against the pole 411 of the both wings at main basal base 41, and the spring anchorage bracket 412 being positioned at pole 411 rear end main basal base 41 is provided with dropout spring 48, thus by the elastic force of dropout spring 48 and be resisted against pole 411 as fulcrum, movable contact spring 42 front end is pressed down on the cross bar 442 that the both wings at dropout plate 44 expose, and is similar to one end by the lever of jack-up.End, movable contact spring 42 front end is provided with contact 422.In order to more preferably position the front end of movable contact spring 42, cross bar 442 is provided with recess and carries out auxiliary stopper.Owing to the fixed mount 415 of main basal base 41 has certain altitude apart from bottom, such that it is able to guarantee that the contact 422 of movable contact spring 42 has safe distance with the contact 431 of static contact 43.
The through hole 31 making the main rod body 451 of push-pull bar 45 stretch through is offered on wiring board 3.The pars intermedia 443 of dropout plate 44 notch 441 both sides overleaf are provided with chuck 444.Push-pull bar 45 includes: main rod body 451, the limited block 452 being connected in main rod body 451 and the snap fit 453 being positioned at lower position, and the snap fit 453 of bottom downwardly extends one section of back-moving spring locating dowel 454.Main basal base 41 is positioned at foremost and is provided with rail groove 41621 for the front end-plate 4162 of U-shaped stopper slot 414, push-pull bar 45 is spacing in being inserted in the rail groove 41621 of front end-plate 4162 by the limited block 452 that connects in its main rod body 451, and the main rod body 451 of push-pull bar 45, snap fit 453 and back-moving spring locating dowel 454 are arranged in the stopper slot 414 of main basal base 41.The epimere of main rod body 451 through hole 31 from wiring board 3 stretches through, and the end of the epimere of main rod body 451 is fixing should " ON " button 131.The back-moving spring locating dowel 454 of main rod body 451 is inserted in one end of the back-moving spring 7 of the bottom being arranged on stopper slot 414.
When pressing downwards " ON " button 131, back-moving spring locating dowel 454 will compress the back-moving spring 7 of the bottom of this stopper slot 414, and simultaneously because electromagnetic trip assembly TK1 has restoring force and 61 release of threading off, thus promote the upper end of dropout plate 44, and the chuck 444 at the snap fit 453 being positioned at lower end of push-pull bar 45 and pars intermedia 443 back side of dropout plate 44 is made to link up with.When discharge " ON " button 131 by dynamic pressure time, back-moving spring 7 release savings elastic force, and owing to the chuck 444 of dropout plate 44 is linked up with by the snap fit 453 of push-pull bar 45, be the most together pulled upwardly.Now, along with lifting on dropout plate 44, under be pressed in movable contact spring 42 front end on the cross bar 442 that the both wings of dropout plate 44 expose and be also lifted, due to the recessed turn of bilge 421 of movable contact spring 42 by pole 411 against as fulcrum, the dropout spring 48 of the lever other end is gradually compressed.Now, due to the existence of the contact 431 of static contact 43, the contact 431 of contact 422 and static contact 43 that movable contact spring 42 can only be raised up to its front end is touched.
When the earth leakage protective line electric circuit inspection on wiring board 3 to electric leakage or overvoltage; electromagnetic trip assembly TK1 action; dropout 61 retraction; thus dropout 61 swings dropout plate 44 by the notch 441 of the upper end of dropout plate 44, so that the snap fit 453 the being positioned at lower end hook of the chuck 444 at pars intermedia 443 back side of dropout plate 44 and push-pull bar 45 departs from.Now, the dropout spring 48 in the spring anchorage bracket 412 of main basal base 41 discharges compression elasticity, and the rear end of movable contact spring 42 is by jack-up, and by lever principle, its front end is pressed down, thus drives dropout plate 44 downward.Now, the contact 431 of contact 422 static contact 43 of movable contact spring 42 departs from, it is achieved open circuit protection.
Additionally, have 2 contacts that can make short circuit on wiring board 3, when pressing " T " button 132, the conductive link AJ1 being installed under it can be driven downward, these 2 test contacts on touching wiring board 3, and there is leakage current signal.Now, the earth leakage protective line circuit on wiring board 3 the most necessarily controls electromagnetic trip assembly TK1 action, threads off according to realization is described above.
And, the feeler lever 4421 that the cross bar 442 of the wherein side of dropout plate 44 extends after vertical is provided with a depression bar 46, and depression bar 46 is connected to " OFF " button 133.When pressing " OFF " button 133, conflict and promote feeler lever 4421 in depression bar 46 lower end, it is possible to so that the dropout plate 44 resetted swings, thus mode realizes hand tripping as described above.
Wiring board 3 in this embodiment generally can use common leakage protection circuit to realize, such as the leakage protection circuit that the employing earth leakage protective chip FM2140 disclosed in patent publication No. 203135399U realizes.But in order to preferably protect, the circuit of the wiring board 3 in this embodiment does not realizes creepage protection function merely with earth leakage protective chip FM2140 on the premise of not increasing cost, also achieves over-voltage protecting function.Refering to shown in Figure 11, it is described as follows:
The circuit of the wiring board 3 in this embodiment is a kind of overvoltage, leakage protection circuit, is connected with power supply including one end, live wire L, zero line N and ground wire E that the other end is connected with load；Described ground wire E is finally connect to the earth；Being in series with the switch module of electrical apparatus release TK1 on live wire L and zero line N, and be socketed with zero sequence current mutual inductor ZCT1, this zero sequence current mutual inductor ZCT1 is to be welded on wiring board 3.The coil block by the electrical apparatus release TK1 concatenated and rectifying bridge type cells D B1 being made up of 4 diode D3-D6 is connected between live wire L and zero line N, two outfans of this rectifying bridge type cells D B1 connect an electric resistance partial pressure unit (series resistor R6 and R7 composition), series resistance R6 of this electric resistance partial pressure unit, the intermediate ends of R7 connects the diode D8 control pole to controllable silicon SCR 1 of one reverse Zener diode D7 of series connection and a forward, the intermediate ends of this Zener diode D7 and polarity diode D8 be connected an electric capacity C7 to this rectifying bridge type cells D B1 rectification ground end.
The outfan of above-mentioned zero sequence current mutual inductor ZCT1 connects has a control circuit, including earth leakage protective chip and peripheral circuit thereof.Described earth leakage protective chip is preferably realized by the low-power consumption double ground fault arc extinguishing chip (Low PowerTwo-Wire Ground Fault Interrupter) that model is FM2140.The secondary windings two ends of described zero sequence current mutual inductor ZCT1 connect a resistance R5.The VFB pin (the 2nd pin) of earth leakage protective chip IC 1 it is connected to after one end of this resistance R5 connects the Vref pin (the 3rd pin) of earth leakage protective chip IC 1 and the other end is connected an electric capacity C4；Preferably, in order to improve capacity of resisting disturbance, this resistance R5 two ends filter capacitor C5 the most in parallel.The Rset pin (the 1st pin) of earth leakage protective chip IC 1 is connected and is connected to its Ground pin (the 4th pin) after a resistance R4; the C Delay pin (the 8th pin) of the earth leakage protective chip IC 1 electric capacity C2 that connects is to its Ground pin (the 4th pin), and the Vref pin (the 3rd pin) of earth leakage protective chip IC 1 connects an electric capacity C3 to its Ground pin (the 4th pin).Preferably, in order to improve capacity of resisting disturbance, the Rset pin (the 1st pin) of earth leakage protective chip IC 1 is also connected and is connected to its Ground pin (the 4th pin) after an electric capacity C6.
The Line pin (the 5th pin) of earth leakage protective chip IC 1 is connected to the anode of above-mentioned controllable silicon SCR 1 through the resistance R3 of concatenation; the anode of controllable silicon SCR 1 is connected to coil block and the intermediate ends of rectifying bridge type cells D B1 of electrical apparatus release TK1, and the negative electrode of controllable silicon SCR 1 is connected to zero line N.The control end of controllable silicon SCR 1 it is connected to after the diode D9 of SCR Trigger pin (a 7th pin) forward of connecting of earth leakage protective chip IC 1.Controllable silicon SCR 1 control the Neutral pin (the 6th pin) that end is also respectively connected with after an an electric capacity C1 and resistance R8 to earth leakage protective chip IC 1, the Neutral pin (the 6th pin) of this earth leakage protective chip IC 1 is connected to zero line N.
Preferably, between described live wire L and zero line N, it is also connected with a varistor MOV1, for avoiding live wire L and the surge voltage of zero line N, it is to avoid damage load because of thunderbolt.
Additionally, live wire L and zero line N also connects, a resistance R1 and conductive link AJ1 is as button, and is socketed on zero sequence current mutual inductor ZCT1, realizes dropout test function when " T " button 132 is pressed.
And, it is also connected with the diode D1 of a forward, current-limiting resistance R2 and light emitting diode D2 between live wire L and zero line N, for indicating operating status.
The overvoltage of wiring board 3 of this embodiment, leakage protection circuit, mainly include the protection circuit of the part compositions such as zero sequence current mutual inductor ZCT1, earth leakage protective chip IC 1, electric resistance partial pressure unit, rectifying bridge type cells D B1, controllable silicon SCR 1 and electrical apparatus release TK1.Its overvoltage crowbar is the overvoltage crowbar using after the bridge rectifier by rectifying bridge type cells D B1 electric resistance partial pressure mode to constitute.When supply voltage exceedes the magnitude of voltage of setting, controllable silicon SCR 1 turns on, electrical apparatus release TK1 action is cut off the electricity supply, it is to avoid electric hidden danger, has ensured the person and property safety.The protection circuit that its leakage protection circuit is made up of parts such as zero sequence current mutual inductor ZCT1 and earth leakage protective chip IC 1.When load is leaked electricity; or when person electric shock or apparatus insulated damage; by the current phasor of zero sequence current mutual inductor primary winding with when being not zero; zero sequence current mutual inductor secondary coil produces induced voltage; it is amplified through integrated circuit electricity leakage protection chip IC 1, compares and processes, when residual current reaches to adjust action current value, export reliable and stable signal by control circuit and make controllable silicon SCR 1 turn on; electrical apparatus release TK1 action, cuts off the electricity supply and plays electric leakage and electrical shock protection effect.Additionally, the effect of electric capacity C5 and C6 is to make leakage circuit pass through testing less than the common mode conduction interference in 150kHz frequency range in standard GB/T 18499 in circuit, which does not affect any performance of circuit.This overvoltage, leakage protection circuit are compared with conventional circuit, and circuit is simple, stable performance, reliable in action.
Although specifically showing in conjunction with preferred embodiment and describing the present invention; but those skilled in the art should be understood that; in the spirit and scope of the present invention limited without departing from appended claims; the present invention can be made a variety of changes in the form and details, be protection scope of the present invention.
Claims (10)
1. earth leakage protective device; including housing and the primary clustering being arranged in housing; primary clustering includes wiring board and electrical apparatus release frame for movement assembly; the circuit of wiring board is used for checking that electric leakage and overvoltage signal occur; and send signals to control electromagnetic trip assembly action; electrical apparatus release frame for movement assembly mainly includes a main basal base, two groups of movable contact springs and static contact, dropout plate, a push-pull bar, and main basal base is fixed on wiring board；Electromagnetic trip assembly is arranged in main basal base, the front end of main basal base is additionally provided with stopper slot, the bottom of stopper slot is provided with a back-moving spring, the pars intermedia of dropout plate is provided with a notch being positioned at top, there are cross bar, dropout plate to be provided in the stopper slot of main basal base being positioned at the extension connection of left and right both wings, and the limited groove of pars intermedia of dropout plate is spacing, the cross bar of the both wings of dropout plate exposes, and the dropout head of electromagnetic trip assembly is released the notch of plate and is limited without deviating from backward simultaneously；The both wings of main basal base are connected to one section of pole, the bottom of main basal base and be positioned at a rod rear end and be respectively arranged with dropout spring, 2 static contacts are arranged on the bottom of front end and distance main basal base and have the position of certain altitude, and it is respectively provided with contact, 2 movable contact springs are that the centre position of strip piece has to recessed turn of bilge, the recessed turn of bilge of these 2 movable contact springs is resisted against the pole of the both wings of main basal base respectively as fulcrum, thus by being positioned at the elastic force of the dropout spring of a rod rear end, movable contact spring front end is pressed down on the cross bar that the both wings at dropout plate expose, end, movable contact spring front end is provided with contact；The pars intermedia of dropout plate notch both sides overleaf are provided with chuck；Push-pull bar includes: main rod body, the limited block being connected in main rod body and be positioned at the snap fit of lower position, and the snap fit of bottom downwardly extends one section of back-moving spring locating dowel, push-pull bar is spacing in being inserted in the rail groove of main basal base front end-plate by the limited block that connects in its main rod body, the main rod body of push-pull bar, snap fit and back-moving spring locating dowel are arranged in the stopper slot of main basal base, and the back-moving spring locating dowel of main rod body is inserted in one end of the back-moving spring of the bottom being arranged on stopper slot.
Earth leakage protective device the most according to claim 1, it is characterized in that: the circuit of this wiring board is a kind of overvoltage, leakage protection circuit, including: the electrical apparatus release that concatenation is connected on live wire and zero line switchs and the zero sequence current mutual inductor of socket, zero sequence current mutual inductor output is connected to an earth leakage protective control circuit being made up of earth leakage protective chip and peripheral circuit thereof, live wire and zero line are also attached to a rectifying bridge type unit, the output of rectifying bridge type unit is connected to an electric resistance partial pressure unit, the input concatenation Zener diode of this electric resistance partial pressure unit is followed by controlling end in a silicon controlled, simultaneously, the outfan of the above-mentioned earth leakage protective control circuit being made up of earth leakage protective chip and peripheral circuit thereof is also connected to this silicon controlled and controls end, this controllable silicon is connected with trip coil and accesses between live wire and zero line.
Earth leakage protective device the most according to claim 2, it is characterised in that: circuit specifically: include one end is connected, the other end is connected with load live wire L, zero line N and ground wire E with power supply；Described ground wire E connects the earth；Live wire L and zero line N are in series with the switch module of electrical apparatus release TK1, and it is socketed with a zero sequence current mutual inductor ZCT1, the coil block by the electrical apparatus release TK1 concatenated and rectifying bridge type cells D B1 being made up of 4 diode D3-D6 is connected between live wire L and zero line N, two outfans of this rectifying bridge type cells D B1 connect series resistor R6 and R7 and form electric resistance partial pressure unit, series resistance R6 of this electric resistance partial pressure unit, the intermediate ends of R7 connects the diode D8 control pole to controllable silicon SCR 1 of one reverse Zener diode D7 of series connection and a forward, the intermediate ends of this Zener diode D7 and polarity diode D8 be connected an electric capacity C7 to this rectifying bridge type cells D B1 rectification ground end；nullThe outfan of above-mentioned zero sequence current mutual inductor ZCT1 connects a control circuit，Including earth leakage protective chip and peripheral circuit thereof，The secondary windings two ends of described zero sequence current mutual inductor ZCT1 connect a resistance R5，The VFB pin of earth leakage protective chip IC 1 it is connected to after one end of this resistance R5 connects the Vref pin of earth leakage protective chip IC 1 and the other end is connected an electric capacity C4，It is connected to its Ground pin after the Rset pin serial connection one resistance R4 of earth leakage protective chip IC 1，The C Delay pin serial connection one electric capacity C2 of earth leakage protective chip IC 1 is to its Ground pin，The Vref pin serial connection one electric capacity C3 of earth leakage protective chip IC 1 is to its Ground pin，The Line pin of earth leakage protective chip IC 1 is connected to the anode of above-mentioned controllable silicon SCR 1 through the resistance R3 of concatenation，The anode of controllable silicon SCR 1 is connected to coil block and the intermediate ends of rectifying bridge type cells D B1 of electrical apparatus release TK1，The negative electrode of controllable silicon SCR 1 is connected to zero line N，The control end of controllable silicon SCR 1 it is connected to after the diode D9 of SCR Trigger pin serial connection one forward of earth leakage protective chip IC 1，Controllable silicon SCR 1 control the Neutral pin that end is also respectively connected with after an an electric capacity C1 and resistance R8 to earth leakage protective chip IC 1，The Neutral pin of this earth leakage protective chip IC 1 is connected to zero line N.
Earth leakage protective device the most according to claim 3, it is characterised in that: this resistance R5 two ends filter capacitor C5 the most in parallel；The Rset pin of this earth leakage protective chip IC 1 is also connected and is connected to its Ground pin after an electric capacity C6.
Earth leakage protective device the most according to claim 4, it is characterised in that: it is also connected with a varistor MOV1 between this live wire L and zero line N.
Earth leakage protective device the most according to claim 5, it is characterised in that: it is also connected with the diode D1 of a forward, current-limiting resistance R2 and light emitting diode D2 between this live wire L and zero line N.
Earth leakage protective device the most according to claim 1 and 2; it is characterized in that: also include a depression bar, the cross bar of the wherein side of this dropout plate also extends one section after vertical, forms a feeler lever; conflicting this feeler lever in the lower end of depression bar, the upper end of depression bar is fixedly connected with the second button.
Earth leakage protective device the most according to claim 1 and 2; it is characterized in that: the front end of this main basal base and be positioned at the left and right both wings of bottom and be provided with the fixed mount of static contact; and fixed mount has certain altitude; these 2 static contacts are the shape that n font downwardly extends a section, so that the n font part of this static contact can install the static contact fixed mount to main basal base.
Earth leakage protective device the most according to claim 1 and 2; it is characterized in that: on this wiring board, offer the through hole making the main rod body of push-pull bar stretch through; the epimere of main rod body through hole from wiring board stretches through, and the end of the epimere of main rod body is fixed with the first button.
Earth leakage protective device the most according to claim 1 and 2; it is characterized in that: also include the 3rd button; under it, conductive link is installed; there are on this wiring board 2 contacts that can make circuit test; when pressing three buttons; the conductive link being installed under it can be driven downward, these 2 test contacts on touching wiring board, and there is leakage current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057495.1A CN103794425B (en) | 2014-02-20 | 2014-02-20 | Earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057495.1A CN103794425B (en) | 2014-02-20 | 2014-02-20 | Earth leakage protective device |
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| Publication Number | Publication Date |
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| CN103794425A CN103794425A (en) | 2014-05-14 |
| CN103794425B true CN103794425B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410057495.1A Active CN103794425B (en) | 2014-02-20 | 2014-02-20 | Earth leakage protective device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104599913B (en) * | 2015-01-21 | 2016-08-24 | 温州高能电气有限公司 | A kind of RCCB |
| CN108418181A (en) * | 2018-05-18 | 2018-08-17 | 谭乔文 | A kind of time lagged type surge protector back-up protection device of no afterflow non-blind area error-free motion |
| CN109767955B (en) * | 2019-03-12 | 2020-07-10 | 杭州汉莱电器有限公司 | Self-locking leakage protector |
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| CN103794425A (en) | 2014-05-14 |
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